Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
308809Factored
FactorDigitsBitsDate
9038539853689907014572169.62007-12-30 14:38:22
ECM
DigitsB1Curves
2550000280 / 280
30250000422 / 640
Estimated T-Level: 28.3
TF below 2^89 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse26D409906F4EA9CC1013
Verified2017-10-12Oliver Kruse26D409906F4EA9CC13625113
Verified2017-12-11ATH26D409906F4EA9CC115101113
Unverified (Reliable)2020-04-18Oliver Kruse380269AF69753E__114394953
History
DateUserTypeResult
2024-02-24Denial140NF-PM1
B1=10000000, B2=206662045590
2024-02-22Denial140NF-PM1
B1=10000000
2023-03-22Denial140NF-PM1
B1=1000000, B2=65871826020
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-18Oliver KruseC-PRP
M308809/903853985368990701457 : 380269AF69753E__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-11ATHC-PRP
M308809/903853985368990701457 : 26D409906F4EA9CC
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M308809/903853985368990701457 : 26D409906F4EA9CC
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M308809/903853985368990701457 : 26D409906F4EA9CC
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M308809/903853985368990701457 : 26D409906F4EA9CC
PRP without proof (not generated)
2007-12-30Chad DavisF-ECM
Factor: 903853985368990701457